Add some just recipes for the Redis cache service (#3538)

docker/cache/justfile

@@ -0,0 +1,22 @@
+set dotenv-load := false
+
+COLOR := "\\033[0;32m"
+NO_COLOR := "\\033[0m"
+
+# Show all available recipes
+@_default:
+    printf "\n{{ COLOR }}# Cache (path: \`docker/cache/\`)\n"
+    printf "==============================={{ NO_COLOR }}\n"
+    just --list --unsorted
+
+#######
+# CLI #
+#######
+
+# Open the Redis CLI as an interactive REPL
+cli *args:
+    just ../../exec cache redis-cli {{ args }}
+
+# Delete all data cached in Redis
+flushall:
+    just cli FLUSHALL

justfile

@@ -13,6 +13,7 @@ DC_USER := env_var_or_default("DC_USER", "opener")
 # Show all available recipes, also recurses inside nested justfiles
 @_default:
     just --list --unsorted
+    cd docker/cache && just
     cd docker/nginx && just
     cd docker/es && just
     cd catalog && just