chore: update README mistakes

Author: AndrewBastin

README.md

@@ -119,7 +119,7 @@ You can provide these values to the container as follows:
   -e PROXYSCOTCH_BANNED_OUTPUTS=<banned_outputs> \
   -e PROXYSCOTCH_BANNED_DESTS=<banned_dests> \
   -p <host_port>:9159 \
-  hoppscotch/proxyscotch:latest
+  hoppscotch/proxyscotch:v0.1.3
   ```
 
 - Via `docker-commpose`:
@@ -128,8 +128,11 @@ You can provide these values to the container as follows:
 
 services:
   proxyscotch:
-    image: hoppscotch/proxyscotch:latest
+    image: hoppscotch/proxyscotch:v0.1.3
     environment:
+      - PROXYSCOTCH_ALLOWED_ORIGINS=<allowed_origins>
+      - PROXYSCOTCH_BANNED_OUTPUTS=<banned_outputs>
+      - PROXYSCOTCH_BANNED_DESTS=<banned_dests>
     ports:
-      - "<host_port>:5432"
+      - "<host_port>:9159"
 ```