Enable setting of API URL via environment variable.

Squashed commit of the following:

commit 00434fb5
Author: Anže Žitnik <anze.zitnik@xlab.si>
Date:   Mon May 30 17:09:08 2022 +0200

    Version 0.1.5

commit 8c3a83fe
Merge: 41cff35a f05e3580
Author: Anže Žitnik <anze.zitnik@xlab.si>
Date:   Mon May 30 15:08:02 2022 +0000

    Merge branch 'settable-api-url' into 'develop'

    Enable setting of API URL via environment variable.

    See merge request medina/cce-frontend!4

commit f05e3580
Author: Anže Žitnik <anze.zitnik@xlab.si>
Date:   Mon May 30 15:08:01 2022 +0000

    Enable setting of API URL via environment variable.

commit 41cff35a
Merge: a83a43f5 0e63df2e
Author: Anže Žitnik <anze.zitnik@xlab.si>
Date:   Mon May 30 15:48:32 2022 +0200

    Merge branch 'master' into develop

commit a83a43f5
Author: Anže Žitnik <anze.zitnik@xlab.si>
Date:   Mon May 30 13:31:46 2022 +0200

    Version 0.1.4

commit 05820fd4
Merge: a19afbab 023e3fdd
Author: Anže Žitnik <anze.zitnik@xlab.si>
Date:   Mon May 30 11:30:14 2022 +0000

    Merge branch 'auto-collapse' into 'develop'

    Start with collapsed nodes

    See merge request medina/cce-frontend!3

commit 023e3fdd
Author: Anže Žitnik <anze.zitnik@xlab.si>
Date:   Mon May 30 11:30:14 2022 +0000

    Start with collapsed nodes

commit a19afbab
Author: Anže Žitnik <anze.zitnik@xlab.si>
Date:   Fri May 27 13:33:56 2022 +0200

    Version up: 0.1.3

commit a2bf39a7
Author: Anže Žitnik <anze.zitnik@xlab.si>
Date:   Thu May 26 17:39:06 2022 +0200

    Add targetValue property.

    Rearrange properties in infoBox.
    Don't show 'code' if same as 'name'.

commit d7dd3b66
Merge: 0bedbed3 dc3d4b90
Author: Anže Žitnik <anze.zitnik@xlab.si>
Date:   Fri May 20 10:04:47 2022 +0200

    Merge branch 'master' into develop

commit 0bedbed3
Author: Anže Žitnik <anze.zitnik@xlab.si>
Date:   Fri May 20 10:00:02 2022 +0200

    Minor fix in instructions.

commit 8df42ada
Author: Anže Žitnik <anze.zitnik@xlab.si>
Date:   Fri May 20 09:47:09 2022 +0200

    Revert "Updated getting for CI from package.json"

    This reverts commit 64b5b515.

commit e318c485
Author: Anže Žitnik <anze.zitnik@xlab.si>
Date:   Fri May 20 09:31:26 2022 +0200

    Version up - 1.1.2

commit 95f07516
Author: Aljaz Nuncic <aljaz.nuncic@xlab.si>
Date:   Thu May 19 19:26:49 2022 +0200

    Added word breaking, permanent node description box option, instructions

commit 64b5b515
Author: Aljaz Nuncic <aljaz.nuncic@xlab.si>
Date:   Thu May 19 19:25:53 2022 +0200

    Updated getting for CI from package.json