update some more warnings and other highlights to admonish blocks

src/Building-ldmx-sw-containerless.md

@@ -1,13 +1,18 @@
 # Building ldmx-sw Without Containers
 
-> _Note:_ This method is _highly_ discouraged. The collaboration has standardized
-  on using the container and so developing and running outside of the standardized
-  container will not be supported.
+```admonish warning title="This method is _highly_ discouraged."
+The collaboration has standardized
+on using the container and so developing and running outside of the standardized
+container will not be supported.
+```
 
 Building ldmx-sw will require the installation of several dependencies. 
 The following guide will walk you through the installation of those dependencies as well as ldmx-sw. 
-**This is your final warning.**
+
+```admonish danger title="This is your final warning."
 These instructions are not being maintained because we standardized on the container build.
+**You are on your own.**
+```
 
 ## Supported Platforms
 * Linux 

src/Contributing-to-ldmx-sw.md

@@ -1,6 +1,8 @@
 # Contributing
 
-> All contributions are welcome. From fixing typos in these documentation pages to patching a bug in the event reconstruction code to adding a new simulatino process. Please reach out via GitHub issues or on the LDMX slack to get started.
+```admonish success title="All contributions are welcome."
+From fixing typos in these documentation pages to patching a bug in the event reconstruction code to adding a new simulation process. Please reach out via GitHub issues or on the LDMX slack to get started.
+```
 
 To contribute code to the project, you will need to create an account on [github](https://github.com/) if you don't have one already, and then request to be added to the [LDMX-Software](https://github.com/orgs/LDMX-Software/) organization.