doc: Improve project description

.github/workflows/crystal.yml

@@ -6,6 +6,9 @@ on:
   pull_request:
     branches: [ master ]
 
+env:
+  DEBIAN_FRONTEND: noninteractive
+
 jobs:
   test:
     runs-on: ubuntu-latest
@@ -18,7 +21,7 @@ jobs:
     - name: Install system dependencies
       run: |
         apt-get update
-        apt-get install cmake 
+        apt-get install -y cmake build-essential g++-9 gcc-9 
     - name: Install project dependencies
       run: shards install
     - name: Run tests
@@ -36,12 +39,12 @@ jobs:
     - name: Install system dependencies
       run: |
         apt-get update
-        apt-get install cmake 
+        apt-get install -y cmake build-essential g++-9 gcc-9 
 
     - name: Install project dependencies
       run: shards install
-    - name: Run tests
-      run: crystal build
+    - name: Run build
+      run: shards build
 
   deliver:
     runs-on: ubuntu-latest

README.md

@@ -1,11 +1,9 @@
 
 # FOSDEM Recorder
 
-## Prerequisites
-
-* Make sure you have a recent Ruby version installed
-* Make sure you have the 'bundler' Gem installed
-
+A tool to schedule FOSDEM recordings and help you record the 5+ talks you
+wanted to attend at the same time. Only for the impatient who can't wait for
+the official videos to be made available.
 
 ## Installation