add docker build and github action

Dockerfile

@@ -0,0 +1,15 @@
+FROM espressif/idf:v5.5 AS firmware-builder
+SHELL ["/bin/bash", "-c"]
+
+ARG LED_BUILTIN=2
+ARG BSP_CONFIG_GPIO=9
+ARG BOARD_SPECIFIC_INIT="boards/default.h"
+
+COPY CMakeLists.txt dependencies.lock /workspace/
+COPY main /workspace/main
+COPY sdkconfig.defaults /workspace/sdkconfig.defaults
+WORKDIR /workspace
+RUN sed -i "s/^CONFIG_LED_BUILTIN=.*/CONFIG_LED_BUILTIN=${LED_BUILTIN}/" sdkconfig.defaults && \
+    sed -i "s/^CONFIG_BSP_CONFIG_GPIO=.*/CONFIG_BSP_CONFIG_GPIO=${BSP_CONFIG_GPIO}/" sdkconfig.defaults && \
+    sed -i "s|^CONFIG_BOARD_SPECIFIC_INIT=.*|CONFIG_BOARD_SPECIFIC_INIT=\"${BOARD_SPECIFIC_INIT}\"|" sdkconfig.defaults
+RUN source /opt/esp/idf/export.sh > /dev/null 2>&1 && idf.py set-target esp32 && idf.py build