Fix env variables overlapping & convex dashboard

docker/env.example

@@ -1,12 +1,12 @@
 # Next Envrionment Variables
 NETWORK=nginx-bridge
-CONTAINER_NAME=techtracker-next
-DOMAIN_NAME=techtracker.gbrown.org
+NEXT_CONTAINER_NAME=techtracker-next
+NEXT_DOMAIN_NAME=techtracker.gbrown.org
 # Port is disabled by default as suggested
 # config is to have reverse proxy on the same
 # network so you can just forward to the
 # port on the internal network.
-PORT=3000
+NEXT_PORT=3000
 
 # Convex Environment Variables
 BACKEND_TAG=00bd92723422f3bff968230c94ccdeb8c1719832