Add justifications section

README.md

@@ -1,9 +1,22 @@
+## Justifications
+- Athena
+    - Less up-front configuration involved. I hope.
+    - AWS wants to lock you into their ecosystem so it'll be cheaper.
+    - In the future, we can switch from CSV to JSON or Parquet or mix and match without any overhead.
+- API Gateway
+    - Rate limiting and caching built-in
+    - Abstracts interfacing with the API away from raw lambda invocation URLs
+    - Can be mapped to a domain
+- Athena
+    - Less up-front configuration involved. I hope.
+    - AWS wants to lock you into their ecosystem so it'll be cheaper.
+    - In the future, we can switch from CSV to JSON or Parquet or mix and match without any overhead.
 ## Challenge Deliverables
-- [ ] Architecture diagram
+- [X] Architecture diagram
-    - [ ] saved as a PNG
+    - [X] saved as a PNG
-- [ ] Explain decisions and trade-offs
+- [X] Explain decisions and trade-offs
-    - [ ] Document in README.md
+    - [X] Document in README.md
-- [ ] Terraform repo scaffolding out the service
+- [X] Terraform repo scaffolding out the service
 ## Air Traffic Metrics
 - [ ] Ingest raw data into S3
     - [X] S3 Bucket
@@ -19,13 +32,13 @@
         - In the future, we can switch from CSV to JSON or Parquet or mix and match without any overhead.
     - [ ] Aurora (Postgresql)
     - [ ] Aurora (Mysql)
-- [ ] API to interact with the data
+- [X] API to interact with the data
-    - [ ] API Gateway
+    - [X] API Gateway
-        - [ ] Policy that grants it lambda invocation rights
+        - [X] Policy that grants it lambda invocation rights
-    - [ ] `/load` endpoint
+    - [X] `/load` endpoint
         - [ ] Python lambda to upload data to bucket
             - [ ] Example data: https://zenodo.org/records/5377831
-    - [ ] `/metrics` endpoint
+    - [X] `/metrics` endpoint
         - [ ] Python lambda that returns the following:
             - [ ] row_count: number of rows in table for full data set
             - [ ] last_transponder_seen_at: maximum value for `lastseen`
@@ -33,4 +46,4 @@
             - [ ] count_of_unique_transponders: unique count of the icao24 field
         - [ ] Execution role that grants it access to athena database
 - [ ] Frontend to display the data
-    - [ ] Python lambda that renders an HTML page that displays above metrics
+    - [X] Python lambda that renders an HTML page that displays above metrics