base: introduce entrypoint

Dockerfile

@@ -86,3 +86,7 @@ ENV GOROOT="/usr/local/go" \
     GOPATH="/root/go" \
     PATH="/usr/local/go/bin:/root/go/bin:/root/.nvm/versions/node/v${NODE_VERSION}/bin:${PATH}"
 
+# Set a custom entrypoint
+COPY entrypoint.sh /entrypoint.sh
+RUN chmod +x /entrypoint.sh
+ENTRYPOINT ["/entrypoint.sh"]

entrypoint.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+
+# This is an entrypoint script that is used execute some actions 
+# when the container is started.
+
+# We clean-up the tmp folder as part of the startup because it can 
+# be flooded very fast with files and folders related to vscode, devextension, yarn, gobuilds etc...
+rm -rf /tmp/*
+
+# Execute the default command from the base image
+exec "$@"