docs: refactor sections, consolidate examples (#1164)

examples/docker/basic.docker-compose.yml

@@ -0,0 +1,21 @@
+version: "3"
+services:
+  pomerium:
+    image: pomerium/pomerium:latest
+    environment:
+      # Generate new secret keys. e.g. `head -c32 /dev/urandom | base64`
+      - COOKIE_SECRET=V2JBZk0zWGtsL29UcFUvWjVDWWQ2UHExNXJ0b2VhcDI=
+    volumes:
+      # Mount your domain's certificates : https://www.pomerium.io/docs/reference/certificates
+      - ~/.acme.sh/*.corp.beyondperimeter.com_ecc/fullchain.cer:/pomerium/cert.pem:ro
+      - ~/.acme.sh/*.corp.beyondperimeter.com_ecc/*.corp.beyondperimeter.com.key:/pomerium/privkey.pem:ro
+      # Mount your config file : https://www.pomerium.io/docs/reference/reference/
+      - ../config/config.minimal.yaml:/pomerium/config.yaml:ro
+    ports:
+      - 443:443
+
+  # https://httpbin.corp.beyondperimeter.com --> Pomerium --> http://httpbin
+  httpbin:
+    image: kennethreitz/httpbin:latest
+    expose:
+      - 80