Add build instructions for creating the http bridge

.travis.yml

@@ -13,9 +13,10 @@ env:
     - EXECUTABLE=$HOME/.local/bin/cardano-wallet-server
     - EXECUTABLE_CHECKSUM=$HOME/.local/bin/cardano-wallet-server.sha256
     - STACK_WORK_CACHE=$HOME/.local/stack-work.tar.gz
+    - PATH=$PATH:$HOME/.cargo/bin
 
 # Do not choose a language; we provide our own build tools:
-language: generic
+language: rust
 
 # Deactivate builds on branches but `master` (CI is still triggered by PRs)
 branches:
@@ -25,6 +26,7 @@ branches:
 # Caching so the next build will be fast too:
 cache:
   timeout: 1337
+  cargo: true
   directories:
   - $HOME/.stack
   - $HOME/.local
@@ -64,6 +66,11 @@ jobs:
     - stack --no-terminal build --test --no-run-tests --coverage --haddock --no-haddock-deps
     - tar czf $STACK_WORK_CACHE .stack-work
 
+  - stage: build 🔨
+    name: "Http Bridge"
+    script:
+    - travis_retry cargo install --git https://github.com/input-output-hk/cardano-http-bridge.git
+
   - stage: checks 🔬
     name: "HLint"
     script:
@@ -80,6 +87,7 @@ jobs:
     name: "Tests"
     script:
     - tar xzf $STACK_WORK_CACHE
+    - cardano-http-bridge --help
     - stack --no-terminal test --coverage
     - tar czf $STACK_WORK_CACHE .stack-work