services:

  program_0:
    build: 
      context: ./program_0  
    volumes:
      - ./var/data:/data 

  program_1:
    build: 
      context: ./program_1  
    volumes:
      - ./var/data:/data
      - ./var/result:/result
    depends_on:
      - program_0  

  program_2:
    build: 
      context: ./program_2  
    volumes:
       - ./var/result:/result
    depends_on:
      - program_1