docs: update code block syntax in README and Raspberry Pi documentation to use bash

README.md

@@ -206,19 +206,19 @@ Targets for `MESHCHATX_BUILD_TARGETS`: `all` (default), `wheel`, or `electron` (
 
 Build:
 
-```text
+```bash
 docker build -f Dockerfile.build -t meshchatx-build:local .
 ```
 
 Build only a wheel:
 
-```text
+```bash
 docker build -f Dockerfile.build --build-arg MESHCHATX_BUILD_TARGETS=wheel -t meshchatx-build:wheel .
 ```
 
 Copy `/artifacts` from the finished image to the host:
 
-```text
+```bash
 cid=$(docker create meshchatx-build:local)
 docker cp "${cid}:/artifacts" ./meshchatx-artifacts
 docker rm "${cid}"

docs/meshchatx_on_raspberry_pi.md

@@ -110,7 +110,7 @@ meshchatx --headless --host 0.0.0.0 --port 8000
 
 Then open:
 
-```text
+```bash
 http://<pi-ip>:8000
 ```
 

meshchatx/src/frontend/public/meshchatx-docs/meshchatx_on_raspberry_pi.md

@@ -110,7 +110,7 @@ meshchatx --headless --host 0.0.0.0 --port 8000
 
 Then open:
 
-```text
+```bash
 http://<pi-ip>:8000
 ```