Housekeeping from getting rfcbot running locally again (#280)

* sync .travis.yml rust version with rust-toolchain's

* update users backup

* remove target spec literal from travis config

* Include DB setup in CONTRIBUTING.md, add script for full backup.

* Create schema.rs with latest version of diesel_cli.

* tell travis to install stable rust instead of our toolchain file

* Update rust version, `cargo update`.

* Fix diesel_cli installation command for use by cargo directly.

Author: anp

.travis.yml

@@ -2,9 +2,6 @@ dist: xenial
 notifications:
   email: false
 language: rust
-rust:
-  # sync in `rust-toolchain` file
-  - nightly-2019-04-26
 cache:
   directories:
     - "$HOME/.cargo"
@@ -33,9 +30,7 @@ install:
   - export DATABASE_URL=postgres://localhost/dashboard
   - export DATABASE_POOL_SIZE=5
   - rustup default $(cat rust-toolchain)
-  - cargo install cargo-update || true
-  - cargo install-update-config diesel_cli --default-features false --feature postgres
-  - cargo install-update -i diesel_cli
+  - cargo install diesel_cli --no-default-features --features postgres -Z install-upgrade
 before_script:
   - diesel setup
   - diesel migration run

CONTRIBUTING.md

@@ -38,10 +38,15 @@ https://devcenter.heroku.com/articles/heroku-cli
 
 See config.rs for the environment variables expected. Also, rocket env vars are supported.
 
+You can also create a [local `.env` file](https://github.com/dotenv-rs/dotenv#examples) which will 
+be added to the environment variables the server sees.
+
 ### Database dumps
 
 It can be useful to have a database with some existing data to start from. "Bootstrap" files are available at https://www.dropbox.com/sh/dl4pxj1d49ici1f/AAAzZQxWVqQzVk_zOksn0Rbya?dl=0. They usually are behind several migrations, so you'll still need to run the migrations if you start from one.
 
+See [below](#database) for information about restoring from a bootstrap file.
+
 ### Running server processes
 
 There are two daemons to run, one for the front-end development server, and one for the back-end API server and scraper. It's recommended to run these in two separate terminal windows/tabs/sessions.
@@ -81,14 +86,17 @@ Note that you can configure the Rocket web server using environment variables li
 
 ## Database
 
-I'm testing with PostgreSQL 9.5. To init, make sure `DATABASE_URL` is set, and:
+To init, make sure `DATABASE_URL` is set and postgres is running, and:
 
 ```
 cargo install diesel_cli
-diesel migration run
+diesel setup
 diesel print-schema > src/domain/schema.rs
 ```
 
+If the database setup experiences errors, your user may not have permission to create databases or
+there may be other configuration problems.
+
 That should have the database you've specified ready to receive data. Then you can run some of the bootstrapping commands (see below). Alternatively, you can use `bootstrap.sql` to get a nice starting point for the database (note that this isn't maintained regularly).
 
 ```bash