chore(docs): documentation for google oauth (#102)

Adding documentation for google auth implementation

docs/mkdocs.yml

@@ -51,6 +51,7 @@ nav:
       - 'Example': 'apps/example.ipynb'
   - 'Single Sign On':
       - 'sso/azure.md'
+      - 'sso/google.md'
   - 'Development Guide':
       - 'Local Development': 'dev-guide/local.md'
       - 'Architecture': 'dev-guide/architecture.md'

docs/src/sso/google.md

@@ -0,0 +1,37 @@
+# Setup SSO with Google
+
+## Register your application with Google
+First register your application with Google using the steps described <a href="https://support.google.com/cloud/answer/6158849?hl=en#zippy=%2Cweb-applications%2Cstep-create-a-new-client-secret" target="_blank">here</a>.
+
+Take note of these;
+
+2. Google Client ID
+2. Google Client Secret
+
+## Configure Nesis
+To configure Nesis for Google, set these environment variables for the respective microservices;
+
+### Frontend
+
+In the frontend, set
+
+```
+NESIS_OAUTH_GOOGLE_ENABLED: true
+NESIS_OAUTH_GOOGLE_CLIENT_ID: 00000000-0000-0000-0000-000000000
+NESIS_OAUTH_GOOGLE_CLIENT_SECRET: your.google.client.secret
+NESIS_OAUTH_GOOGLE_REDIRECTURI: http[s]://your.nesis.host.name/
+NESIS_OAUTH_TOKEN_KEY: __some__random_secure_key___
+NESIS_OAUTH_TOKEN_VALUE: ___some___other___very__random___key
+```
+
+In the api service, set
+```
+NESIS_OAUTH_TOKEN_KEY: __some__random_secure_key___
+NESIS_OAUTH_TOKEN_VALUE: ___some___other___very__random___key
+```
+
+!!! warning "Important"
+
+    The key `NESIS_OAUTH_TOKEN_KEY` and value `NESIS_OAUTH_TOKEN_VALUE` must match in both services.
+
+You should now be able to authenticate with Google.