diff --git a/Containerfile b/Containerfile
index 8594aa8..363da31 100644
--- a/Containerfile
+++ b/Containerfile
@@ -32,9 +32,9 @@ RUN apk add yosys
 WORKDIR /home/root/aur-install
 
 # Install prjxray librairies
-RUN git clone https://github.com/supersurviveur/prjxray.git && \
+RUN git clone https://github.com/supersurviveur/prjxray.git --depth 1 && \
     cd prjxray && \
-    git submodule update --init && \
+    git submodule update --init --depth 1 && \
     # include fasm2frames in python package
     mv utils/fasm2frames.py prjxray/ && \
     sed -E 's/(fasm2frames=)utils/\1prjxray/' -i setup.py && \
@@ -44,7 +44,7 @@ RUN git clone https://github.com/supersurviveur/prjxray.git && \
         -DCMAKE_INSTALL_PREFIX='/usr' \
         -DCMAKE_POLICY_VERSION_MINIMUM=3.5 \
         -Wno-dev && \
-    cmake --build build && \
+    cmake --build build -j$(nproc) && \
     python -m build --wheel --no-isolation --skip-dependency-check && \
     python -m installer dist/*.whl && \
     python -m build third_party/fasm --wheel --no-isolation --skip-dependency-check && \
@@ -53,9 +53,8 @@ RUN git clone https://github.com/supersurviveur/prjxray.git && \
 # prjxray dependency not available on apk
 RUN pip install textx --break-system-packages
 
-# RUN fasm2frames
 # Install the zynq7 prjxray database
-RUN git clone https://github.com/f4pga/prjxray-db.git && \
+RUN git clone https://github.com/f4pga/prjxray-db.git --depth 1 && \
     cd prjxray-db && \
     install -dm 755 /usr/share/xray/database && \
     cp -r zynq7 /usr/share/xray/database/ && \
@@ -63,9 +62,9 @@ RUN git clone https://github.com/f4pga/prjxray-db.git && \
     rm /usr/share/xray/database/zynq7/xc7z020 -rf
 
 # Install nextpnr-himbaechel
-RUN git clone https://github.com/YosysHQ/nextpnr && \
+RUN git clone https://github.com/YosysHQ/nextpnr --depth 1 && \
     cd nextpnr && \
-    git submodule update --remote --init himbaechel/uarch/xilinx/meta && \
+    git submodule update --remote --init --depth 1 himbaechel/uarch/xilinx/meta && \
     cmake -S "." -B build \
         -DARCH=himbaechel \
         -DHIMBAECHEL_UARCH=xilinx \
@@ -76,21 +75,12 @@ RUN git clone https://github.com/YosysHQ/nextpnr && \
         -DCMAKE_BUILD_TYPE=None \
         -DCMAKE_INSTALL_PREFIX=/usr \
         -DUSE_OPENMP=ON && \
-    make -C build
-
-# This part is specific to djtgcfg but it doesn't detect the card over USB (missing driver ?)
-# # Install djtgcfg
-# # Install avahi (djtcfg dependency)
-# RUN apk add avahi
-# RUN git clone https://aur.archlinux.org/digilent.adept.runtime.git && \
-#     cd digilent.adept.runtime && makepkg -si --noconfirm --needed
-# RUN git clone https://aur.archlinux.org/digilent.adept.utilities.git && \
-#     cd digilent.adept.utilities && makepkg -si --noconfirm --needed
+    make -C build -j$(nproc)
 
 # Install sv2v
-RUN git clone https://github.com/zachjs/sv2v && \
+RUN git clone https://github.com/zachjs/sv2v --depth 1 && \
     cd sv2v && \
-    make
+    make -j$(nproc)
 
 COPY copy_bin_deps.sh /usr/bin/
 RUN chmod +x /usr/bin/copy_bin_deps.sh
@@ -104,17 +94,13 @@ RUN copy_bin_deps.sh /home/root/aur-install/prjxray/build/tools/xc7frames2bit
 RUN copy_bin_deps.sh /home/root/aur-install/sv2v/bin/sv2v
 RUN cp /usr/bin/fasm2frames /dependencies/usr/bin/
 
-# djtgcfg
-# RUN copy_bin_deps.sh /usr/bin/djtgcfg
-# RUN copy_bin_deps.sh /usr/bin/dftdrvdtch
-
 # Final image
 FROM alpine:edge
 
 # Install dependencies available in apk
 RUN echo "https://dl-cdn.alpinelinux.org/alpine/edge/testing" >> /etc/apk/repositories && \
     apk update && \
-    apk add abc py3-yaml py3-simplejson py3-intervaltree py3-arpeggio
+    apk add abc py3-yaml py3-simplejson py3-intervaltree py3-arpeggio openfpgaloader
 
 # Get dependencies back
 COPY --from=builder /dependencies /
@@ -130,13 +116,6 @@ COPY --from=builder /usr/lib/python3.12/site-packages/prjxray /usr/lib/python3.1
 COPY --from=builder /usr/lib/python3.12/site-packages/fasm /usr/lib/python3.12/site-packages/fasm
 COPY --from=builder /usr/lib/python3.12/site-packages/textx /usr/lib/python3.12/site-packages/textx
 
-# This part is specific to djtgcfg but it doesn't detect the card over USB (missing driver ?)
-# COPY --from=builder /usr/share/digilent /usr/share/digilent
-# COPY --from=builder /etc/digilent-adept.conf /etc/digilent-adept.conf
-# COPY --from=builder /etc/ld.so.conf.d/digilent-adept-libraries.conf /etc/ld.so.conf.d/digilent-adept-libraries.conf
-# Generate ld configuration for digilent programs
-# RUN ldconfig
-
 WORKDIR /root/code
 
 CMD ["/bin/bash -c \"$@\""]
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..5e9a85a
--- /dev/null
+++ b/README.md
@@ -0,0 +1,42 @@
+This repository contains a podman image whichs contains all necessary tools to generate and flash bitstream file from a SystemVerilog program.
+It is build for the xilinx zybo zynq7 `xc7z010` card, but it can probably be easily edited to support another card.
+
+# Installation
+
+You will need [podman](https://podman.io/) to run the image.
+
+## Use the pre-built image
+
+You can directly use the pre-build image present in the repo
+
+```bash
+zstd -d fmn.tar.zst
+podman load --input fmn.tar
+```
+
+## Build the image from source
+
+You can build the image yourself by using this command:
+
+```bash
+podman build -t fmn_alpine .
+```
+
+It will first create an image which will build every tools, and then create the final image containing only needed binaries and libraries.
+
+For information, it takes around 5.63GB space and 10 minutes to build on my device.
+
+# Tools
+
+- [sv2v](https://github.com/zachjs/sv2v) : Convert SystemVerilog to Verilog.
+- [yosys](https://github.com/YosysHQ/yosys) : Do RTL synthesis from verilog files.
+- [nextpnr-himbaechel](https://github.com/YosysHQ/nextpnr) : placing and routing tool.
+- [fasm2frames](https://github.com/f4pga/prjxray) : Convert fasm files to frames files.
+- [xc7frames2bit](https://github.com/f4pga/prjxray) : Convert frames files to bitstream.
+- [openFPGALoader](https://github.com/trabucayre/openFPGALoader) : Flash a bitstream on a FPGA card.
+
+The image also contains some [databases](https://github.com/f4pga/prjxray-db) needed for prjxray tools to work.
+
+# Usage
+
+See the small [example](./example/).
diff --git a/example/.gitignore b/example/.gitignore
new file mode 100644
index 0000000..c3533ef
--- /dev/null
+++ b/example/.gitignore
@@ -0,0 +1,6 @@
+abc.history
+adder.v
+out.bin
+out.fasm
+out.frames
+synthesis.json
diff --git a/example/README.md b/example/README.md
new file mode 100644
index 0000000..b229b31
--- /dev/null
+++ b/example/README.md
@@ -0,0 +1,48 @@
+# Example
+
+This directory shows how to flash a system verilog program (A full-adder) on a Zybo `xc7z010clg400-1` card.
+
+## Build
+
+Firstly, the system verilog file needs to be converted to verilog in order to use it with yosys :
+
+```bash
+podman run --mount=type=bind,source=.,target=/root/code fmn_alpine sv2v adder.sv -w adder.v
+```
+
+The mount parameter is used to provide to podman the current directory.
+
+Then, yosys can achieve the RTL synthesis of the program :
+
+```bash
+podman run --mount=type=bind,source=.,target=/root/code fmn_alpine yosys adder.v -p "synth_xilinx; write_json synthesis.json"
+```
+
+Nextpnr can now place and route each components using the xdc constraints file :
+
+```bash
+podman run --mount=type=bind,source=.,target=/root/code fmn_alpine nextpnr-himbaechel --json synthesis.json -o xdc=adder.xdc -o fasm=out.fasm --device xc7z010clg400-1
+```
+
+Now the fasm file can be converted in a frames file and then in a bitstream :
+
+```bash
+podman run --mount=type=bind,source=.,target=/root/code fmn_alpine fasm2frames --part xc7z010clg400-1 --db-root /usr/share/xray/database/zynq7 out.fasm out.frames
+podman run --mount=type=bind,source=.,target=/root/code fmn_alpine xc7frames2bit -frm_file out.frames -part_file /usr/share/xray/database/zynq7/xc7z010clg400-1/part.yaml --output_file out.bin
+```
+
+## Flashing the FPGA
+
+Finally, we can flash the bitstream on the card with `openFPGALoader`.
+
+Podman requires a device argument to allow openFPGALoader to access the usb interface. You can find this path with `lsusb` :
+
+```txt
+Bus 003 Device 005: ID 0403:6010 Future Technology Devices International, Ltd FT2232C/D/H Dual UART/FIFO IC
+```
+
+Here the usb device path is `/dev/bus/usb/003/005`
+
+```bash
+podman run --device=/dev/bus/usb/003/005 --mount=type=bind,source=.,target=/root/code fmn_alpine openFPGALoader -b zybo_z7_10 out.bin
+```
diff --git a/example/adder.sv b/example/adder.sv
new file mode 100644
index 0000000..72fe6dd
--- /dev/null
+++ b/example/adder.sv
@@ -0,0 +1,14 @@
+module AC(
+  input  clock,
+         io_a,
+         io_b,
+         io_c,
+  output io_s,
+         io_co
+);
+
+  wire tmp = io_a ^ io_b;
+  assign io_s = tmp ^ io_c;
+  assign io_co = io_a & io_b | tmp & io_c;
+endmodule
+
diff --git a/example/adder.xdc b/example/adder.xdc
new file mode 100644
index 0000000..5cd7b76
--- /dev/null
+++ b/example/adder.xdc
@@ -0,0 +1,19 @@
+# Create a clock
+set_property PACKAGE_PIN L16     [get_ports clock]
+set_property IOSTANDARD LVCMOS33 [get_ports clock]
+
+create_clock -period 8.00 [get_ports  clock]
+
+# Buttons
+set_property PACKAGE_PIN G15     [get_ports io_a]
+set_property IOSTANDARD LVCMOS33 [get_ports io_a]
+set_property PACKAGE_PIN P15     [get_ports io_b]
+set_property IOSTANDARD LVCMOS33 [get_ports io_b]
+set_property PACKAGE_PIN W13     [get_ports io_c]
+set_property IOSTANDARD LVCMOS33 [get_ports io_c]
+
+# LEDs
+set_property PACKAGE_PIN M14     [get_ports io_s]
+set_property IOSTANDARD LVCMOS33 [get_ports io_s]
+set_property PACKAGE_PIN M15     [get_ports io_co]
+set_property IOSTANDARD LVCMOS33 [get_ports io_co]
diff --git a/fmn.tar.zst b/fmn.tar.zst
new file mode 100644
index 0000000..0cba4f0
Binary files /dev/null and b/fmn.tar.zst differ