Add support to build for the python3.10 Lambda runtime

.github/dependabot.yml

@@ -42,6 +42,11 @@ updates:
     schedule:
       interval: "weekly"
 
+  - package-ecosystem: "pip"
+    directory: "/src/py3.10"
+    schedule:
+      interval: "weekly"
+
   - package-ecosystem: "terraform"
     directory: "/"
     schedule:

.github/workflows/build.yml

@@ -145,6 +145,7 @@ jobs:
           - "3.7"
           - "3.8"
           - "3.9"
+          - "3.10"
     steps:
       - uses: actions/checkout@v3
       - name: Get the short SHA for the commit being used

Dockerfile

@@ -1,9 +1,9 @@
-ARG PY_VERSION=3.9
+ARG PY_VERSION=3.10
 
 FROM amazon/aws-lambda-python:$PY_VERSION as install-stage
 
 # Declare it a second time so it's brought into this scope.
-ARG PY_VERSION=3.9
+ARG PY_VERSION=3.10
 
 # Install the Python packages necessary to install the Lambda dependencies.
 RUN python3 -m pip install --no-cache-dir \
@@ -41,7 +41,7 @@ LABEL org.opencontainers.image.authors="github@cisa.dhs.gov"
 LABEL org.opencontainers.image.vendor="Cybersecurity and Infrastructure Security Agency"
 
 # Declare it a third time so it's brought into this scope.
-ARG PY_VERSION=3.9
+ARG PY_VERSION=3.10
 
 # This must be present in the image to generate a deployment artifact.
 ENV BUILD_PY_VERSION=$PY_VERSION

src/py3.10/Pipfile

@@ -0,0 +1,11 @@
+[[source]]
+url = "https://pypi.org/simple"
+verify_ssl = true
+name = "pypi"
+
+[requires]
+python_version = "3.10"
+
+[packages]
+cowsay = "*"
+example = {file = "https://github.com/cisagov/skeleton-python-library/archive/v0.1.0.tar.gz"}