Backend GKE Deploy, access key for backend

- Configs and automation for deploying backend to GKE
- First steps to adding an optional token check for requests to backend
- First steps frontend sending optional token to backend when configured

sample.env

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+# Copy this file over to .env and fill in the desired config.
+# .env will become available to docker compose and these values will be
+# used when running docker compose up
+
+# Edit to set OpenAI access key
+OPENAI=ADD OPENAI KEY HERE
+
+# Uncomment and edit to set GROQ access key
+# GROQ: ${GROQ}
+
+# Uncomment and edit to set OLLAMA Url
+# OLLAMA_API_URL: ${OLLAMA_API_URL}
+
+# Address and port of the remotely deployed Perplexica backend
+REMOTE_BACKEND_ADDRESS=111.111.111.111:0000
+
+# Uncomment and edit to configure backend to reject requests without token
+# leave commented to have open access to all endpoints
+# Secret key to "secure" backend
+# SUPER_SECRET_KEY=THISISASUPERSECRETKEYSERIOUSLY