docs: missing docs for container resources (#1747)

Signed-off-by: Derek Wang <whynowy@gmail.com>

docs/user-guide/reference/configuration/container-resources.md

@@ -49,6 +49,54 @@ spec:
               memory: 4Gi
 ```
 
+## UDSource Container
+
+To specify `resources` for `udsource` container of a source vertex pods:
+
+```yaml
+apiVersion: numaflow.numaproj.io/v1alpha1
+kind: Pipeline
+metadata:
+  name: my-pipeline
+spec:
+  vertices:
+    - name: my-vertex
+      source:
+        udsource:
+          container:
+            resources:
+              limits:
+                cpu: "3"
+                memory: 6Gi
+              requests:
+                cpu: "1"
+                memory: 4Gi
+```
+
+## Source Transformer Container
+
+To specify `resources` for `transformer` container of a source vertex pods:
+
+```yaml
+apiVersion: numaflow.numaproj.io/v1alpha1
+kind: Pipeline
+metadata:
+  name: my-pipeline
+spec:
+  vertices:
+    - name: my-vertex
+      source:
+        transformer:
+          container:
+            resources:
+              limits:
+                cpu: "3"
+                memory: 6Gi
+              requests:
+                cpu: "1"
+                memory: 4Gi
+```
+
 ## UDSink Container
 
 To specify `resources` for `udsink` container of vertex pods:
@@ -95,4 +143,4 @@ spec:
             memory: 4Gi
 ```
 
-Container resources for [user init-containers](init-containers.md) are instead specified at `.spec.vertices[*].initContainers[*].resources`.
+Container resources for [user init-containers](init-containers.md) are instead specified at `.spec.vertices[*].initContainers[*].resources`.