```Dockerfile
COPY ./requirements.txt /code/requirements.txt
```

Docker and other tools **build** these container images **incrementally**, adding **one layer on top of the other**, starting from the top of the `Dockerfile` and adding any files created by each of the instructions of the `Dockerfile`.

			Typeflag: '2',
			Format:   FormatGNU,
		}},
	}, {
		// GNU tar file with atime and ctime fields set.
		// Created with the GNU tar v1.27.1.
		//	tar --incremental -S -cvf gnu-incremental.tar test2
		file: "testdata/gnu-incremental.tar",
		headers: []*Header{{
			Name:       "test2/",
			Mode:       16877,
			Uid:        1000,
			Gid:        1000,
			Size:       14,

             *
             * This is where we recursively invoke the provided andx smb
             * object to write it's parameter words and bytes to our outgoing
             * array. Incedentally when these andx smbs are created they are not
             * necessarily populated with header data because they're not writing
             * the header, only their body. But for whatever reason one might wish

              // Indexed Header Field.
              writeInt(headerIndex, PREFIX_7_BITS, 0x80)
            }
            headerNameIndex == -1 -> {
              // Literal Header Field with Incremental Indexing - New Name.
              out.writeByte(0x40)
              writeByteString(name)
              writeByteString(value)
              insertIntoDynamicTable(header)
            }

             *
             * This is where we recursively invoke the provided andx smb
             * object to write it's parameter words and bytes to our outgoing
             * array. Incedentally when these andx smbs are created they are not
             * necessarily populated with header data because they're not writing
             * the header, only their body. But for whatever reason one might wish

          <type>String</type>
        </field>
        <field>
          <name>buildNumber</name>
          <version>1.0.0+</version>
          <description>The incremental build number</description>
          <type>int</type>
        </field>
        <field>
          <name>localCopy</name>
          <version>1.0.0+</version>

			return nil, err
		}
		b.Write(valBuf)
		if i < len(kvs)-1 {
			b.Write([]byte(","))
		}
	}
	b.Write([]byte("}"))
	return b.Bytes(), nil
}

// Decoder wraps an io.Reader to provide incremental decoding of
// JSON values
type Decoder struct {
	*scanner
	emitDepth     int
	maxDepth      int
	emitKV        bool
	emitRecursive bool
	objectAsKVS   bool

	depth   int
	scratch *scratch

     * indicate how many bytes(note: readParameterWordsWireFormat
     * returns bytes read and not the number of words(but the
     * wordCount member DOES store the number of words)) we
     * actually read. Incedentally this is important to the
     * AndXServerMessageBlock class that needs to potentially
     * read in another smb's parameter words and bytes based on
     * information in it's andxCommand, andxOffset, ...etc.
     */ 

    public static final String APPEND_QUERY_PARAMETER_PROPERTY = "append.query.parameter";

    public static final String INCREMENTAL_CRAWLING_PROPERTY = "crawling.incremental";

    public static final String CRAWLING_THREAD_COUNT_PROPERTY = "crawling.thread.count";

    public static final String CRAWLING_USER_AGENT_PROPERTY = "crawling.user.agent";

		}
		err := s.Err()
		if err != nil {
			t.Errorf("#%d: %v", n, err)
		}
	}
}

// slowReader is a reader that returns only a few bytes at a time, to test the incremental
// reads in Scanner.Scan.
type slowReader struct {
	max int
	buf io.Reader
}

func (sr *slowReader) Read(p []byte) (n int, err error) {
	if len(p) > sr.max {
		p = p[0:sr.max]
	}