Add setup for DynamoDB.

Author: alexmacarthur

.gitignore

@@ -1 +1,2 @@
 docker-compose.override.yml
+.env

README.md

@@ -1,24 +1,24 @@
 # Local Docker DB
 
-## What?
+A collection of Docker Compose files I've used to quickly spin up local databases of various sorts.
 
-A collection of Docker Compose files I've used to quickly spin local databases of various sorts.
+# Included Databases
 
-## Why?
+Database   | Docker Compose Configuration | Website
+---------- | ---------------------------- | ----------------------------------
+DynamoDB   | [./dynamo](./dynamo/)        | <https://aws.amazon.com/dynamodb/>
+Fauna      | [./fauna](./fauna/)          | <https://fauna.com/>
+MariaDB    | [./maria](./maria/)          | <https://mariadb.org/>
+MongoDB    | [./mongo](./mongo/)          | <https://www.mongodb.com/>
+MySQL      | [./mysql](./mysql/)          | <https://www.mysql.com/>
+PostgreSQL | [./postgres](./postgres/)    | <https://www.postgresql.org/>
+Redis      | [./redis](./redis/)          | <https://redis.io/>
 
-Because I've oft needed them, particularly when I just don't wanna deal with the hassle of spinning up a DB on my own system.
+## Usage
 
-## How? 
+Clone the repo or copy a `docker-compose.yml` file to your system, `cd` into that directory, and turn it on with `docker-compose up` (unless otherwise noted by the directory's `README.md`). You may also use a `docker-compose.override.yml` file inside this repository to customize a container.
 
-Clone the repo or copy a `docker-compose.yml` file to your system, `cd` into that directory, and turn it on with `docker-compose up`. You may also use a `docker-compose.override.yml` file inside this repository to customize a container. For a full reference on how to use Docker Compose, [go here](https://docs.docker.com/compose/reference/).
-
-## Explore a Container w/ Bash
-
-In any given container, run the following. Most of the time, the service name will just be `db`, but there may be an exception or two.
-
-```
-docker-compose exec --user root SERVICE_NAME /bin/bash
-```
+For a full reference on how to use Docker Compose, [go here](https://docs.docker.com/compose/reference/).
 
 ## Local Persistence
 

dynamo/.env-sample

@@ -0,0 +1,3 @@
+AWS_ACCESS_KEY_ID=
+AWS_SECRET_ACCESS_KEY=
+AWS_DEFAULT_REGION=

dynamo/README.md

@@ -0,0 +1,21 @@
+# DyanmoDB w/ Docker Compose
+
+## Starting the Container
+
+Run `docker-compose up db` to turn on the DynamoDB container. After starting, the DB instance will be running at `http://localhost:8000`.
+
+## Accessing the DB w/ the AWS CLI
+
+Run `cp .env-sample .env` to create a new `.env` file, and fill the variables with your AWS credentials.
+
+In order to run `aws` CLI commands against the locally-running DyanmoDB instance, use `docker-compose run aws SOME_AWS_COMMAND`. For example, referencing the DyanmoDB [developer guide](https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/getting-started-step-1.html), you could create a table by running the following:
+
+```bash
+docker-compose run aws dynamodb create-table --table-name Music --attribute-definitions AttributeName=Artist,AttributeType=S AttributeName=SongTitle,AttributeType=S --key-schema AttributeName=Artist,KeyType=HASH AttributeName=SongTitle,KeyType=RANGE --provisioned-throughput ReadCapacityUnits=10,WriteCapacityUnits=5
+```
+
+And then list all tables by running this:
+
+```bash
+docker-compose run aws dynamodb list-tables
+```

dynamo/docker-compose.yml

@@ -0,0 +1,21 @@
+version: '3'
+
+services:
+  db:
+    command: -jar DynamoDBLocal.jar -sharedDb -dbPath ./data
+    image: amazon/dynamodb-local:latest
+    ports:
+      - 8000:8000
+    volumes:
+      - dbdata:/home/dynamodblocal
+  aws:
+    depends_on:
+      - db
+    image: banst/awscli
+    ports:
+     - 8080:8080
+    env_file:
+      - .env
+
+volumes:
+  dbdata: