[LEARNING-2] Update Several Files Related Docker File

[tiaranrh]

Hi @daniel-ciocirlan , thank you for this course I've been studying a lot about Spark including how to use docker in this project.

• Previously I was encountered an issue while executing the following commands:

chmod +x build-images.sh
./build-images.sh

error:

3 warnings found (use docker --debug to expand):
 - LegacyKeyValueFormat: "ENV key=value" should be used instead of legacy "ENV key value" format (line 7)
 - LegacyKeyValueFormat: "ENV key=value" should be used instead of legacy "ENV key value" format (line 8)
 - LegacyKeyValueFormat: "ENV key=value" should be used instead of legacy "ENV key value" format (line 9)

What's next:
    View a summary of image vulnerabilities and recommendations → docker scout quickview 

so I've updated several docker files to fix the legacy "ENV key value" warnings by switching to the correct ENV key=value format.

• Update commands in README.md use docker compose instead of docker-compose in accordance with Docker v2.

I hope these updates will be helpful for others taking this course. cmiiw, thank you ^^

[tiaranrh]

Related this changes, when I am checking parquet file that Year column return number value

It might be from schema in my editor *I'm using avro viewer by IntelijIDEA

 {
    "name" : "Year",
    "type" : [ "null", {
      "type" : "int",
      "logicalType" : "date"
    } ],
    "default" : null
  }

is it valid?? I think we need to convert this column to date before write to parquet, because datetype is temporal type

[daniel-ciocirlan]

this section wants to demonstrate that Parquet is the default file format, the dates are not very important

[tiaranrh]

ahh I see, okey I will rollback this changes in the next commit. thanks