feat: agoric client docker-compose config (#2701)

* feat: agoric client docker-compose config (WIP)

* fix(docker): update for actual ag-solo setup arguments

* refactor(docker): move defaults from .env to compose file

* refactor(docker): promote docker-compose file near repo root

* fix(docker): expose ag-solo port on container network

* fix: make `agoric` CLI available in ag-solo image

* fix(docker): add README.md

* docs(docker): flesh out docker-compose README

* docs(docker): remove unix-ism

* fix: use http://agoric.com/discord

This Discord join URL will be permanent (for now).

Co-authored-by: Michael FIG <mfig@agoric.com>

docker/README.md

@@ -0,0 +1,136 @@
+# Setting up an Agoric Dapp Client with docker-compose
+
+See [Appendix: Installing Docker
+Compose](#appendix-installing-docker-compose) below if you don't
+already have `docker-compose` installed.
+
+## Quick Start (Overview)
+
+ 1. Start the `ag-solo` service: `docker-compose up -d`
+ 2. Watch the logs for registration details: `docker-compose logs -f --tail=50`
+ 3. Issue an unguessable URL to the wallet: `docker-compose exec ag-solo npx agoric open --repl`
+
+## Detailed Instructions
+
+### Start `ag-solo` in the background and watch the logs
+
+Get
+[docker-compose.yml](https://github.com/raw/Agoric/agoric-sdk/2697-docker-client/docker/docker-compose.yml), make sure it's in the current directory of your terminal, and enter the following commands:
+
+```sh
+docker-compose pull    # get the current image
+docker-compose up -d
+docker-compose logs -f --tail=50
+```
+
+You should see logs like:
+
+```
+ag-solo_1  | 2021-03-23T19:50:25.466Z ag-solo: init: key generated, now extracting address
+ag-solo_1  | 2021-03-23T19:50:25.534Z ag-solo: init: ag-solo initialized in /usr/src/agoric-sdk/packages/cosmic-swingset/solo/agoric
+ag-solo_1  | 2021-03-23T19:50:25.535Z ag-solo: init: HTTP/WebSocket will listen on 0.0.0.0:8000
+```
+
+_Note: visiting `0.0.0.0:8000` without an access token is of little use._
+
+### Register your client via the Agoric discord faucet
+
+The `ag-solo` service will prompt you every few seconds until you register:
+
+```
+ag-solo_1  | =============
+ag-solo_1  | agoricdev-1 chain does not yet know of address agoric1l73dgx3yhxc6...
+ag-solo_1  | 
+ag-solo_1  | Send:
+ag-solo_1  | 
+ag-solo_1  |   !faucet client agoric1l73dgx3yhxc6...
+ag-solo_1  | 
+ag-solo_1  | to #faucet channel on https://agoric.com/discord
+ag-solo_1  | =============
+```
+
+So visit https://agoric.com/discord , go to the `#faucet` channel, and
+enter the message as instructed. After a brief pause, you should see
+in discord that your request was approved.
+
+_Note: Each address can be registered this way only once. If you make
+another request with the same address, it will be declined._
+
+Your `ag-solo` log should show:
+
+```
+ag-solo_1  | 2021-03-23T19:51:09.339Z start: swingset running
+```
+
+At this point, you can stop the `docker-compose logs` process
+(Control-C).
+
+### Open the Agoric wallet using an unguessable URL
+
+Request an unguessable URL using `agoric open`:
+
+```sh
+docker-compose exec ag-solo npx agoric open --repl
+```
+
+You should see:
+
+
+```
+Launching wallet...
+http://127.0.0.1:8000#accessToken=kIqLZ99mQe6TGpvTN...
+```
+
+Visit that URL to open the Agoric wallet and REPL.
+
+Right away the wallet should show "connected" to the local `ag-solo`,
+but most of the page is inactive while it does a few on-chain
+transactions to locate issuers and such. Then you should see a few
+purses with balances of various (fictitous) tokens.
+
+## Persistent state: the `ag-solo` volume
+
+You may have noticed that the `ag-solo` service generated a key when
+it started:
+
+```
+ag-solo_1  | 2021-03-23T19:50:25.466Z ag-solo: init: key generated, now extracting address
+```
+
+The `docker-compose.yml` file is configured to set up an `ag-solo`
+docker volume to store that key and your client state.
+
+You can bring your `ag-solo` service up and down as usual; the `ag-solo`
+volume is preserved:
+
+```sh
+docker-compose down
+
+docker-compose up -d
+
+# to check whether it's up or down:
+docker-compose ps
+```
+
+### DANGER ZONE
+
+If you want to reset the client state (note that this will **LOSE ALL
+TOKENS**), use `docker-compose down -v` to remove the persistent
+volume.
+
+
+## Appendix: Installing Docker Compose
+
+Choose your platform:
+
+ - Mac: [Install Docker Desktop on
+   Mac](https://docs.docker.com/docker-for-mac/install/)
+ - Windows: [Install Docker Desktop on
+   Windows](https://docs.docker.com/docker-for-windows/install/)
+ - Linux: [Install Docker
+   Engine](https://docs.docker.com/engine/install/#server) and then
+   [Install Docker Compose](https://docs.docker.com/compose/install/)
+ - Other: [Alternative install options](https://docs.docker.com/compose/install/#alternative-install-options)
+
+_Note: On desktop systems like Docker Desktop for Mac and Windows,
+Docker Compose is included as part of those desktop installs._

docker/docker-compose.yml

@@ -0,0 +1,19 @@
+version: "2.2"
+services:
+  ag-solo:
+    image: agoric/cosmic-swingset-solo:${SDK_TAG:-latest}
+    # ISSUE: 127.0.0.1? not a docker network?
+    ports:
+      - "${HOST_PORT:-8000}:${PORT:-8000}"
+    volumes:
+      - "ag-solo-state:/usr/src/app/solo"
+      - "$HOME/.agoric:/root/.agoric"
+    environment:
+      - "AG_SOLO_BASEDIR=${SOLO_HOME:-agoric}"
+    command:
+      - setup
+      - --webhost=0.0.0.0
+      - --webport=${PORT:-8000}
+      - --netconfig=${NETCONFIG_URL:-https://devnet.agoric.net/network-config}
+volumes:
+  ag-solo-state:

packages/cosmic-swingset/lib/ag-solo/Dockerfile

@@ -2,7 +2,7 @@ ARG TAG=latest
 FROM agoric/agoric-sdk:$TAG
 
 WORKDIR /usr/src/app
-RUN ln -sf $PWD/bin/ag-solo /usr/local/bin/
+RUN ln -sf $PWD/bin/ag-solo $PWD/node_modules/.bin/agoric /usr/local/bin/
 COPY . lib/ag-solo/
 WORKDIR /usr/src/app/solo
 

packages/cosmic-swingset/lib/ag-solo/chain-cosmos-sdk.js

@@ -16,7 +16,8 @@ import { makeBatchedDeliver } from './batched-deliver';
 const log = anylogger('chain-cosmos-sdk');
 
 const HELPER = 'ag-cosmos-helper';
-const FAUCET_ADDRESS = '#faucet channel on Discord (https://discord.gg/9nKvca)';
+const FAUCET_ADDRESS =
+  '#faucet channel on Discord (https://agoric.com/discord)';
 
 const adviseEgress = myAddr =>
   `\