update docs for interative shell instructions

README.mdown

@@ -6,8 +6,8 @@ Powershell scripts are included to try and recreate these build environments dir
 
 # Requirements
 
-A Windows 10 workstation or VM with minimum 8 GB of memory is required.
+A Windows 10.0.19041.804+ workstation or VM with minimum 8 GB of memory is required.
-The more concurrent containers you have running, the more memory and CPU cores is required.
+The more concurrent containers you have running, the more memory and CPU cores are required.
 
 **Each container requires one core and approximately 4 GB of memory.**
 
@@ -48,19 +48,16 @@ Below is an example `docker-compose.yaml` file used to build a project configure
 version: '3'
 
 services:
-  win64_build_release:
+  win_build:
     image: win_build
     volumes:
       - .:C:/source/
-    command: msbuild .
 ```
 
 - `volumes:` are mounted within the Docker container.
 
     - `C:/source/` is assumed to be the project being build with MSVC.
 
-- `command:` passes arguments to `Microsoft.VisualStudio.DevShell` unless entrypoint is otherwise defined.
-
 To build a Windows XP project use the `image: winxp_build` container image.
 
 # Build Your Windows Project
@@ -69,7 +66,28 @@ The above `docker-compose.yaml` file should be stored within your project and wi
 Once this file is created within your project run the following command to begin the build process.
 
 ```bash
-docker-compose up
+docker-compose run win_build
+```
+
+This will drop you into the visual studio developer shell or console for winxp.
+
+To modify the developer shell environments replace `command:` in your `docker-compose.yaml` with the desired environment variables or scripted build commands.
+
+```
+version: '3'
+
+services:
+  win_build:
+    image: win_build
+    volumes:
+      - .:C:/source/
+    command: powershell -NoExit -Command Import-Module C:\\msvc\\Common7\\Tools\\Microsoft.VisualStudio.DevShell.dll; Enter-VsDevShell -Verbose -VsInstallPath C:\\msvc\\
+
+  winxp_build:
+    image: winxp_build
+    volumes:
+      - .:C:/source/
+    command: cmd /k C:\\msvc\\Common7\\Tools\\VsDevCmd.bat
 ```
 
 # Optional Workstation Scripts

vs15.config

@@ -2,6 +2,6 @@
   "version": "1.0",
   "components": [
     "Microsoft.VisualStudio.Workload.VCTools",
-    "Microsoft.VisualStudio.ComponentGroup.NativeDesktop.WinXP",
+    "Microsoft.VisualStudio.ComponentGroup.NativeDesktop.WinXP"
   ]
 }

vs16.config

@@ -2,6 +2,6 @@
   "version": "1.0",
   "components": [
     "Microsoft.VisualStudio.Workload.VCTools",
-    "Microsoft.VisualStudio.Component.NuGet",
+    "Microsoft.VisualStudio.Component.NuGet"
   ]
 }