White spruce

I received a white spruce as a gift last year and it has been in a pot and indoors since I received it. Recently I have noticed that some of the needles have turned brown at the base and that some random needles are browning from the tips inward. It sits in front of a window that gets 5 hours of afternoon sun 1pm- 6pm. I believe the tree is only a year old. I was wondering if this browning is natural as the tree grows or is something more serious going on.

Two years old (2016 & 2017 seasons growth visible). The lower browning is not healthy; not too surprising as it is not a species adapted to growing in pots indoors. Plant it outside as soon as possible; give it moderate shade for the first few days until it adapts to outdoor sunlight.

Two years old (2016 & 2017 seasons growth visible). The lower browning is not healthy; not too surprising as it is not a species adapted to growing in pots indoors. Plant it outside as soon as possible; give it moderate shade for the first few days until it adapts to outdoor sunlight.

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Thank you for your response! I really appreciate it :)
But is there a way I can keep it alive in a container? I don't have a place to plant it and I might be moving soon and don't want to leave it behind.