feat(en): added Dockerfile to build EN from scratch (#2640)

Signed-off-by: tomg10 <[email protected]>

docs/guides/external-node/building-from-scratch/Dockerfile

@@ -0,0 +1,31 @@
+FROM matterlabs/zk-environment:latest2.0-lightweight
+
+RUN git clone https://github.com/matter-labs/zksync-era
+
+WORKDIR /usr/src/zksync/zksync-era
+
+# core 24.16.0 (#2608), see: https://github.com/matter-labs/zksync-era/releases
+RUN git reset --hard 1ac52c5
+
+ENV ZKSYNC_HOME=/usr/src/zksync/zksync-era
+ENV PATH="${ZKSYNC_HOME}/bin:${PATH}"
+
+# build zk tool
+RUN zk
+RUN yarn zk build
+
+# build rust
+RUN cargo build --release
+RUN cp target/release/zksync_external_node /usr/bin
+
+# build contracts
+RUN git submodule update --init --recursive
+RUN zk run yarn
+RUN zk compiler all
+RUN zk contract build
+RUN zk f yarn run l2-contracts build
+
+# copy migrations (node expects them to be in specific directory)
+RUN cp -r core/lib/dal/migrations/ migrations
+
+ENTRYPOINT [ "sh", "docker/external-node/entrypoint.sh"]