Disable lengthy git initialization and testing steps in Dockerfile

Author: hacker-cb

images/platformio/Dockerfile

@@ -57,15 +57,16 @@ COPY pio_project/ /tmp/pio_project/
 # Use pio run to download all toolchains and frameworks
 # pio run - downloads all toolchains and frameworks
 # pio test - download Unity test dependencies
-WORKDIR /tmp/pio_project
-RUN git init \
-    && git config user.email "build@local" \
-    && git config user.name "Build System" \
-    && git add . \
-    && git commit -m "Initial commit" --no-gpg-sign --quiet \
-    && for e in $PIO_ENVS; do pio run -e "$e"; done \
-    && for e in $PIO_ENVS; do pio test -e "$e" --without-uploading --without-testing; done \
-    && rm -rf /tmp/pio_project
+# - VERY LONG step, temporarily disabled
+#WORKDIR /tmp/pio_project
+#RUN git init \
+#    && git config user.email "build@local" \
+#    && git config user.name "Build System" \
+#    && git add . \
+#    && git commit -m "Initial commit" --no-gpg-sign --quiet \
+#    && for e in $PIO_ENVS; do pio run -e "$e"; done \
+#    && for e in $PIO_ENVS; do pio test -e "$e" --without-uploading --without-testing; done \
+#    && rm -rf /tmp/pio_project
 
 # Set working directory
 WORKDIR /workspace