Fix container build targets

Author: doganulus

.devcontainer/devcontainer.json

@@ -2,7 +2,8 @@
   "name": "Reelay",
   "build": {
     "dockerfile": "../containers/devel/Dockerfile",
-    "context": "../containers"
+    "context": "../containers",
+    "target": "reelay-devel"
   },
   "postCreateCommand": "make configure",
   "customizations": {

containers/devel/Dockerfile

@@ -55,5 +55,5 @@ RUN pip3 install --no-cache --break-system-packages \
       cmake-format \
       pytest
 
-FROM docker.io/library/ubuntu:24.04 AS reelay-devel
+FROM reelay-builder AS reelay-devel
 ARG TARGETARCH TARGETOS TARGETPLATFORM TARGETVARIANT