🐳 Improving env handling of docker containers

Dockerfile

@@ -1,13 +1,24 @@
 FROM node:14.16.0
 
+# Create working directory and copy required code files
 RUN mkdir /workdir
 ADD bot.js /workdir/bot.js
 ADD package.json /workdir/package.json
 ADD package-lock.json /workdir/package-lock.json
-ADD .env /workdir/.env
 
+# Set the working directory
 WORKDIR /workdir
 
+# Install npm packages
 RUN npm i
 
+# Declare required environment variables
+ENV API_BEARER ""
+ENV IRC_OAUTH ""
+ENV ACCESS_KEY ""
+
+# Rewrite .env file every time the container starts
+CMD "echo \"API_BEARER=$API_BEARER\nIRC_OAUTH=$IRC_OAUTH\nACCESS_KEY=$ACCESS_KEY\" > /workdir/.env"
+CMD "cat .env"
+# Start the bot
 CMD ["node", "bot.js"]