updated the first slide

01_scalar_equations.html

@@ -312,7 +312,7 @@ int main(int argc, char** argv)
 
 # Compile and run the AMDiS program
 
-### CMake configuration
+### 1. Create a CMake configuration
 File `DIR/CMakeLists.txt`
 ```cmake
 project("workshop")
@@ -321,10 +321,10 @@ add_executable("poisson" src/poisson.cc)
 target_link_libraries("poisson" AMDiS)
 ```
 
-- CMake requires variable `AMDIS_DIR` to point to directory that contains the file `AMDISConfig.cmake`. This
-  is set automatically in Docker container.
+- CMake requires variable `AMDIS_DIR` to point to directory that contains the file `AMDISConfig.cmake`. (This
+  is set already in the Docker container.)
 
-### Compile
+### 2. Compile
 ```
 cd DIR
 mkdir build && cd build       # out-of-source build
@@ -364,7 +364,7 @@ Scanning dependencies of target poisson
 
 ---
 
-### Run an AMDiS program
+### 3. Run the AMDiS program
 ```
 cd DIR
 ./build/poisson INIT-FILE