Update mission configs (#34)

* Clean package caches (saves about 1GB of layer-space)

* Update installation instructions

* Update layout
* Use template variables where appropriate
* Instructions now provide release notes in one place

* Pandoc now uses --standalone

2 files changed, 48 insertions, 33 deletions

diff --git a/mission/jwst/Dockerfile.in b/mission/jwst/Dockerfile.in
index c3c826a..705ed81 100644
--- a/mission/jwst/Dockerfile.in
+++ b/mission/jwst/Dockerfile.in
@@ -72,6 +72,8 @@ RUN sed -i -e "s|@CONDA_CHANNEL@|${HOME}/packages/conda|;s|@PIP_ARGUMENTS@|--ext
 RUN mamba install \
         git \
         ${CONDA_PACKAGES} \
-    && mamba env create -n linux --file ${HOME}/SNAPSHOT.yml
+    && mamba env create -n linux --file ${HOME}/SNAPSHOT.yml \
+    && conda clean --all \
+    && rm -rf ${HOME}/.cache
 WORKDIR ${HOME}
 CMD ["/bin/bash"]
diff --git a/mission/jwst/readme.md.in b/mission/jwst/readme.md.in
index 79fcb55..51929a3 100644
--- a/mission/jwst/readme.md.in
+++ b/mission/jwst/readme.md.in
@@ -1,49 +1,62 @@
-# {{meta.name}} {{meta.version}}
+# {{ info.release_name }}
 
-Currently, conda is required to manage installation of the environment.
-A fresh installation of Anaconda3 or Miniconda3 is not required for
-each {{meta.name}} release, however.  An existing conda installation may be
-used. The method described here allows for multiple, entirely segregated,
-pipeline installations.
+Conda is required to manage installation of the delivery environment. A fresh installation of {{ conda.installer_name }} is not required for each {{ meta.name }} delivery, however. An existing conda installation may be used. The method described here allows for multiple entirely separate pipeline installations.
 
-A `bash`-compatible shell is required for all steps below. Python
-dependencies are taken directly from PyPI or development repositories as
-needed, so conda's ability to install hybrid conda/pip environments from a
-YAML specification is used. This requires first downloading the
-specification file and then creating the environment with it.
+A POSIX-compatible shell (e.g. `bash`) is required for all steps below. Python dependencies are taken directly from PyPI or development repositories as needed, so conda's ability to install hybrid conda/pip environments from a YAML specification is used. This requires first downloading the specification file and then creating the environment with it.
 
-## For existing conda installations:
+------
+
+# Installing Conda
+
+If conda is not available on the target system, it will need to be installed and configured before the delivery environment can be installed.
+
+For detailed instructions of this step, please visit:
+https://conda.io/projects/conda/en/latest/user-guide/install/index.html
+
+**{{ conda.installer_name }}:**
 
-### Install the pipeline environment
 ```
-$ curl -O https://ssb.stsci.edu/releases/{{meta.name}}/{{meta.version}}/{{info.release_name}}.yml
-$ conda env create --file {{info.release_name}}.yml
+wget {{ conda.installer_baseurl }}/{{ conda.installer_name }}-{{ conda.installer_version }}-{{ conda.installer_platform }}-{{ conda.installer_arch }}.sh
+bash {{ conda.installer_name }}-{{ conda.installer_version }}-{{ conda.installer_platform }}-{{ conda.installer_arch }}.sh
+$HOME/{{ conda.installer_name }}/condabin/conda init
 ```
-### Activate the pipeline environment
+
+# Installing {{ meta.name }}
+
+## Option 1: Install this delivery
 
 ```
-$ conda activate {{info.release_name}}
+conda env create \
+    --file https://ssb.stsci.edu/stasis/releases/{{ meta.mission }}/{{ info.build_name }}/delivery/{{ info.release_name }}.yml
 ```
 
-Each new delivery iteration of the calibration environment will need to be
-installed using the above commands.
+### Activate this delivery
 
-------
+```
+conda activate {{ info.release_name }}
+```
 
-## If conda is not yet installed
+## Option 2: Install the latest delivery
 
-If the conda tool is not available on the target system, it will need to be
-installed before the calibration environment can be installed.
+**Warning:** The `latest` URL may provide software different than what is presented by the release notes section below!
 
-### Installing conda
+```
+conda env create \
+    --name {{ meta.name }}-latest-py{{ meta.python_compat }} \
+    --file https://ssb.stsci.edu/stasis/releases/{{ meta.mission }}/{{ info.build_name }}/delivery/latest-py{{ meta.python_compact }}-{{ system.platform }}-{{ system.arch }}.yml
+```
+### Activate the latest delivery
 
-For detailed instructions of this step, please visit:
-https://conda.io/projects/conda/en/latest/user-guide/install/index.html
+```
+conda activate {{ meta.name }}-latest-py{{ meta.python_compat }}
+```
 
-**Miniconda:**
+------
 
-```
-$ wget {{conda.installer_baseurl}}/{{conda.installer_name}}-{{conda.installer_version}}-{{conda.installer_platform}}-{{conda.installer_arch}}.sh
-$ bash {{conda.installer_name}}-{{conda.installer_version}}-{{conda.installer_platform}}-{{conda.installer_arch}}.sh
-$ $HOME/{{conda.installer_name}}/condabin/conda init
-```
\ No newline at end of file
+Each new delivery iteration will need to be installed using one of the above commands.
+
+------
+
+# Software Release Notes
+
+{{ func:get_github_release_notes_auto() }}