Created documentation for Incubator Deployment

mkdocs/docs/developer/deployment-infra.md

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+_<p style="text-align: center;">Project deployment and hosting</p>_
+
+
+
+![CTJ Infrastructure Diagram](../assets/ctj-infra-diagram.png)
+
+
+### Summary
+CivicTechJobs is hosted on the Incubator AWS account, which is managed by the DevOps CoP. The application is deployed through Fargate, which itself deploys the CivicTechJob docker image. This repo sends updates to the Incubator through a github action `deploy-stage.yml`.
+
+Incubator aws resources are managed using terraform files which are commited to the [Incubator Source](https://github.com/hackforla/incubator/tree/main/terraform/projects/civic-tech-jobs)
+
+The resources used by CTJ include the following: 
+- A Database(shared with other projects)
+- DNS Entry
+- ECS Task Definition
+- A Fargate Task
+
+
+### Github Action
+Github actions are the mechanism used to convey changes in this CivicTechJobs repo to the AWS deployment. The deploy-stage action is set to run on any updates to the main branch. On run the action will assume an AWS credential, push the newest docker image to the ECR, then force a ECS-Fargate redeployment. This process will depend on OIDC to grant AWS permissions for its execution 
+
+### Regarding Environment Variables
+The combination of Fargate(a managed service from AWS) and terraform means that environment variables are passed into the application differently than when the application is run locally. The environment variables are set in terraform at the following [location](https://github.com/hackforla/incubator/blob/main/terraform/projects/civic-tech-jobs/environment-stage.tf).
+Note that these variables are the same as those found in this repo's [env.example](https://github.com/hackforla/CivicTechJobs/blob/develop/dev/dev.env.example)
+
+Some values will come from the terraform modules, but in essense if you must add or edit environment variables for the application in deployment, you will need to change them in Incubator.
+
+### DNS
+The staging environment is current set to run at: https://stage.civictechjobs.org/
+
+Domain management is done in AWS Route53, through terraform files found in Incubator
+
+### Fargate
+AWS Fargate is a managed service which allows CTJ to easily deploy it's containerized application. This is done by updating a AWS task definition and then restarting the associated Fargate service. 
+
+Both of these steps are preformed automatically by the github action in `deploy-stage.yml` when new commits are merged into the `main` branch
+
+
+## Additional Resources
+
+[Incubator Repo](https://github.com/hackforla/incubator/tree/main/terraform/projects/civic-tech-jobs)