Version 22 uses Dockerfile21 (labkey) and Dockerfile14 (psql), labkey image is also part of nix repository at docker hub labelled with version identical to dockerfile (21)

config/labkey-compose22.yaml

@@ -5,7 +5,7 @@ services:
 #
     build:
             context: ./db
-            dockerfile: Dockerfile
+            dockerfile: Dockerfile14
             args:
                     USER_ID: ${USER_ID}
                     GROUP_ID: ${GROUP_ID}
@@ -28,10 +28,11 @@ services:
 
     build: 
             context: ./web
-            dockerfile: Dockerfile
+            dockerfile: Dockerfile21
             args:
                     USER_ID: ${USER_ID}
                     GROUP_ID: ${GROUP_ID}
+    image: andrejstuden/nix:v21
 
     volumes:
       - ${LABKEY_DIR}:/usr/local/labkey