Best friend/roommate relapsed and I'm not sure how to support her sobriety

Hey everyone, I'm sorry for formatting issues, I am on mobile. For context: I am 29 months sober off heroin, dilaudid, and alcohol. My best friend/roommate, Becky (28F fake name) is a recovering alcoholic and she's been sober almost a year.... well last night I walked into her room and caught her off guard and she was drinking.... so I was like yo wtf. Told her I was worried about her and asked her to dump it out... so she did. And she was crying and kept apologizing to me and saying how sorry she was she upset me/risked my sobriety. She went to bed and I could hear her crying through my bedroom wall. I have dealt with addiction myself, but supporting someone else's sobriety and helping them navigate early sobriety is new to me... I want to be there for her. She said that was the first time she's relapsed in the year she's been sober. She said she was triggered due to financial issues as she is now working 6 days a week to make ends meet. How do I go about this situation? I reacted with kindness, understanding, and empathy. I want to provide a supportive, nurturing environment for her. We have been friends 15 years.. I don't want to let her down. Any advice would be helpful.

Also.... she's agreed to go to an outpatient treatment program and go with me to meetings.